18. Use a ruler and a pair of compasses only to constract a triangle ABC in which AB= 4.6 cm, BC = 5.4 cm AND < ABC =75°. Measure AC .drop a perpendicular from B to meet AC at N. Measure BN. Hence calculate the area of triangle ABC ( 5mks)

19.Find the size of the angle of the angle marked a in the figure below (3mks)